Underdosing of alpha-adrenoreceptor antagonists, init encntr

This code signifies a patient experiencing adverse effects or a lack of therapeutic response due to receiving an insufficient dose of an alpha-adrenoreceptor antagonist. This underdosing can lead to uncontrolled symptoms of the condition the medication is intended to treat, such as hypertension or benign prostatic hyperplasia.

Use this code when documentation clearly indicates that a prescribed alpha-blocker was administered at a dose lower than therapeutically required, resulting in a negative clinical outcome. This applies to situations where the patient's symptoms are not adequately managed because the medication dosage was too low, either due to patient non-compliance or a prescribing error.

• Always sequence this code after the primary diagnosis for which the alpha-blocker was prescribed.
• Ensure documentation specifies "underdosing" and identifies the drug class as an alpha-adrenoreceptor antagonist.
• The "A" in the seventh character indicates an initial encounter for the underdosing event.